Mod 2 Lec 4.2 flagella Flashcards
What is flagella subunit made of
flagellin
what system provides energy for flagella movement
ion powered membrane located rotary motor
(H+ movement)
4 types of arrangement of flagella
monotrichous
lophptrichous
amphitrichous
peritrichous
3 basic structures of flagella
basal body
hook
filament
where is L ring located
outer memb
where is P ring located
peptidoglycan layer
what are the lowest two rings
MS ring
C ring
how do the rings rotate
trick question pfft
rings dont rotate
the rod does
what are the two motor proteins called
MotA
MotB
avg size of filament
~20nm to 15microns long
remember avg bact = 2microns
what is taxis
moving towards or away from chemical or physical cues
general process of chemotaxis
counterclockwise = flagella get all bundled in start moving in one direction baby u light up my world like nobody else
this is called a run
then it’ll go clockwise = tumbles, so all flagella poof out and it randomises the direction of the next run
then goes ccw and starts moving in another direction
and the length of the run deternmined by if it’s chemoattractant or chemorepellant (chemoattractants cause the run to be longer and it delays the switch, see diagram)
main functions of pili/fimbrae
adhere to surfaces via adhesins
form biofilm at surface
conjuction pili = allow two bact to interact during horizontal gene transfer
what is type iv pili involved in
pathogens e.g cholerae, gonorrhoeae
what is pap
pyelonephrites associated pili
